Tube-mill lining.



G. H. ROTHERHAM.

TUBE MILL LINING.v

APPLICATION FILED Hmz, 1999.

Patented Nov. 9, 1909.

l||| Il lill IHI l Hlll H IH GEORE H.`ROTHERHAM, OF TONOPAH, NEVADA.

TUBE-MILL LINING.

Specification of Letters Patent.

Patented Nov. 9, 1909.

Application tiled February 2,1909. Serial No. 475,647.

To all whom 'it may concern.'

Be it. known that I, GEORGE I-I. ROTHER- im, a British subject, residing at'Tonopah, in the county of Esmeralda and State ot' Nevada, have invented new and useful Improvements in Tube-Mill Linings, of which the following is a s ecification.

This` invention re ates to grinding-mills, and pertains Aespecially to tube mills for use in grinding the ore for purposes of cyaniding.

The object of my invention is to provide a tiibnlar mill with a removable and renewable sectional lining, and further provide a simple, practical and inexpensive mea-ns for securing the lining in place in. the tube without in any way injuring or weakening the shell of the mill.

The invention consists of the parts and the construction vand .combination of parts as hereinafter more lullydescribed and claimed, having reference to the accom-v panying drawings, 'in which- Figure 1 is a transverse section through the mill, the linersbeing in elevation. 4Fi 2 is a side elevation of a portion of a nii l, partially in section, showing the liners in position. Fig. 3 is a detail section on line X-X, Fig. 4. Fig. 4 is a detail showing the locking. pins in position.

A represents a cylindrical shell ot' suitable size and material having an annular bearing flange 3 at each end adapted to run on the supporting rollers 4, and revolved by the usual gearing (not shown).

The lining, which constitutes the main t'eature of the invention, consists of segmental plates or sections 6 having suitable grooves or coi-rugations 7 on its coiicaved tace; 'the grooves extending transversely of the plat-es and parallel with the length of the shellI and receiving the flint pebbles 8 by which ,the actual grinding is done. These liner plates (l may be of any suitable dimensions.

An important feature is the means by which the liners are held iii position circumferentially within the shell. By the means employed the sections are locked serui'ely in place without rivets or bolts and in adjacent side-by-side sections are coincident, and the channels of the abutting ends of sections in the same cil-cum fereiitial series register, so that the channels are adapted to receivesuitable locking pins or keys t) which may be of any desirable cross-sectional area the next succeeding ring; thus the entire lining is locked in the tube without any in jury to, or weakening of, the shell A.

The liner plates are made removable by 'having them Aspaced apart suiiicicntly, as

shown at 10, so that a. lcold chisel or driving pin, as 11, maybe inserted into the slot l() behind a pin 9, and by means of a hammer,

causing the pin 9 to be driven to one side so as to release thatend of two sections Which are in the same circumferential series. By loosening the pins at each side and each end of a plate, the latter can easily be taken out.

There may be any number of rings or circumferential series ot' plates placed end to end 'and removably locked by the pins H. This is ot' great importance in the mining industry, where mills once started in oper-- ation are kept running'night and day, the only time the mill is stopped being for cleaning up purposes, or for making repairs. It is, therefore, important to have the mill made as durable as possible, and to make any Wearing parts readily removable and replaceable, as l have done.

Having thus described my invention, what I claim and desire to secure by Letters Patent isf 1. A tube mill comprising a. cylinder, and an inside lining for the cylinder consisting of segmental corrugated plates, the adjacent ends of the plates grooved longitiuliually of the' cylinder, and short keys fitting iii said grooves and bridging the joint between the ends of contiguous horizontally alined plates, each of said keys having one port-ion fitting the groove of one plate and having another portion extending beyond said plate and adapted to enter a horizont-ally alined groove iu the adjacent plate to thereby lock the plates in position in' the cylinder.

2. In a tube mill, the combination of a cylinder having` an inside lining comprising a plurality of segmental plates conforming to the curvature of the cylinder, the longitudinal edges of the plates spaced apart suficiently to allow a plate to be turned inwardly toward the axis of the mill to remove the plate without disturbing the others, and

`means fitting between these spaced longitu dinal edges of the plates for holding the plate in position, independent of other fastening' means.

3. ln a tube mill,l the combination of a cylinder, and an inside lining for the cylinder, consisting of a series of segmental plates, conforming to the curvature of the cylinder, the longitudinal edges ofthe plates spaced apart, and longitudinally grooved, with keys fitting in the grooves adjacent to the ends of the plates to loc-k the plates in nesses.

position in the cylinder, the spacing apart of said plates beingr suicient to admit a tool between the plates, and to permit a key to be driven out endwise to release the plate, and the spacing between said plates also being sufficient to allow a plate to be turned inwardly toward the axis of the cylinder to remove a plate without disturbing the others.

In testimony whereof I have hereunto set my hand-in presence of two subscribing wit GEORGE H. ROTHERHA M. Witnesses H. R. COOKE,

EDWARD HAGERMAN.

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